论文标题
沙子中的撞击壁板：比较固体和液体入侵者
Impact cratering in sand: Comparing solid and liquid intruders
论文作者
论文摘要
可变形液滴对颗粒床的影响与由相似大小和密度的固体撞击器引起的颗粒床有何不同？在这里，我们通过实验研究了这个问题，并着重于入侵者变形性对火山口形状的影响。对于可比较的冲击能，我们表明液滴的火山口直径大于固体入侵者，但后者的影响会导致更深的陨石坑。有趣的是，对于大于0.58的堆积分数的最初密集的床，我们发现所得的发掘的火山口体积与入侵者的变形性无关，这表明这些密集床的沙子中无影响的耗散机制。
How does the impact of a deformable droplet on a granular bed differ from that caused by a solid impactor of similar size and density? Here, we experimentally study this question and focus on the effect of intruder deformability on the crater shape. For comparable impact energies, we show that the crater diameter is larger for droplets than for solid intruders but that the impact of the latter results in deeper craters. Interestingly, for initially dense beds of packing fractions larger than 0.58, we find that the resultant excavated crater volume is independent of the intruder deformability, suggesting an impactor-independent dissipation mechanism within the sand for these dense beds.
